<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>websocket客户端</title>
</head>
<body>
<script type="text/javascript">
    var socket;
    if(window.WebSocket){
        socket = new WebSocket("ws://localhost:8082/ws");
        socket.onmessage = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value=ta.value+"\n"+ev.data;
        }
        socket.onopen = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value="连接开启！";
        }
        socket.onclose = function (ev) {
            var ta = document.getElementById("responseText");
            ta.value=ta.value+"\n"+"连接关闭";
        }

    }else{
        alert("浏览器不支持websocket");
    }

    function send(message) {
        if(!window.WebSocket){
            return;
        }
        if(socket.readyState == WebSocket.OPEN){
            var sessionId = socket.sessionId;
            socket.send(message);
        } else{
            alert("连接未开启");
        }
    }

</script>

<form onsubmit="return false">
    <textarea name="message" style="width: 400px;height: 200px"></textarea>
    <input type="button" value="发消息" onclick="send(this.form.message.value)">
    <h3>服务器输出：</h3>
    <textarea id="responseText" style="width: 400px;height: 200px"></textarea>
    <input type="button" onclick="javascript:document.getElementById('responseText').value=''" value="清空消息">
</form>

</body>
</html>